text: /*	$NetBSD: nfsrtt.h,v 1.5 1997/05/12 23:36:08 fvdl Exp $	*/
  
  /*
   * Copyright (c) 1992, 1993
   *	The Regents of the University of California.  All rights reserved.
   *
   * This code is derived from software contributed to Berkeley by
   * Rick Macklem at The University of Guelph.
   *
   * Redistribution and use in source and binary forms, with or without
   * modification, are permitted provided that the following conditions
   * are met:
   * 1. Redistributions of source code must retain the above copyright
   *    notice, this list of conditions and the following disclaimer.
   * 2. Redistributions in binary form must reproduce the above copyright
   *    notice, this list of conditions and the following disclaimer in the
   *    documentation and/or other materials provided with the distribution.
   * 3. All advertising materials mentioning features or use of this software
   *    must display the following acknowledgement:
   *	This product includes software developed by the University of
   *	California, Berkeley and its contributors.
   * 4. Neither the name of the University nor the names of its contributors
   *    may be used to endorse or promote products derived from this software
   *    without specific prior written permission.
   *
   * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
   * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
   * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   * SUCH DAMAGE.
   *
   *	@(#)nfsrtt.h	8.2 (Berkeley) 3/30/95
   */
  
  
  #ifndef _NFS_NFSRTT_H_
  #define _NFS_NFSRTT_H_
  
  /*
   * Definitions for performance monitor.
   * The client and server logging are turned on by setting the global
   * constant "nfsrtton" to 1.
   */
  #define	NFSRTTLOGSIZ	128
  
  /*
   * Circular log of client side rpc activity. Each log entry is for one
   * rpc filled in upon completion. (ie. in order of completion)
   * The "pos" is the table index for the "next" entry, therefore the
   * list goes from nfsrtt.rttl[pos] --> nfsrtt.rttl[pos - 1] in
   * chronological order of completion.
   */
  struct nfsrtt {
  	int pos;			/* Position in array for next entry */
  	struct rttl {
  		u_int32_t	proc;		/* NFS procedure number */
  		int		rtt;		/* Measured round trip time */
  		int		rto;		/* Round Trip Timeout */
  		int		sent;		/* # rpcs in progress */
  		int		cwnd;		/* Send window */
  		int		srtt;		/* Ave Round Trip Time */
  		int		sdrtt;		/* Ave mean deviation of RTT */
  		fsid_t		fsid;		/* Fsid for mount point */
  		struct timeval	tstamp;	/* Timestamp of log entry */
  	} rttl[NFSRTTLOGSIZ];
  };
  
  /*
   * And definitions for server side performance monitor.
   * The log organization is the same as above except it is filled in at the
   * time the server sends the rpc reply.
   */
  
  /*
   * Bits for the flags field.
   */
  #define	DRT_NQNFS	0x01	/* Rpc used Nqnfs protocol */
  #define	DRT_TCP		0x02	/* Client used TCP transport */
  #define	DRT_CACHEREPLY	0x04	/* Reply was from recent request cache */
  #define	DRT_CACHEDROP	0x08	/* Rpc request dropped, due to recent reply */
  #define DRT_NFSV3	0x10	/* Rpc used NFS Version 3 */
  
  /*
   * Server log structure
   * NB: ipadr == INADDR_ANY indicates a client using a non IP protocol.
   *	(ISO perhaps?)
   */
  struct nfsdrt {
  	int pos;			/* Position of next log entry */
  	struct drt {
  		int       flag;		/* Bits as defined above */
  		u_int32_t proc;		/* NFS procedure number */
  		u_int32_t ipadr;	/* IP address of client */
  		int       resptime;	/* Response time (usec) */
  		struct timeval tstamp;	/* Timestamp of log entry */
  	} drt[NFSRTTLOGSIZ];
  };
  
  #endif
  